Question

While burning methane, you collect 3000 kj of energy. How many grams were burned?

Answer 1

While burning methane, you collect 3000 kj of energy. How many grams were burned?

answer: The units are usually given as kJ mol (kJ/mol) or sometimes as kcal mol ... The combustion of methane, CH4, releases 890.4 kJ/mol. That is, when one mole of methane is burned

Answer 2

The mass of methane burnt is 16 grams

Explanation:

We are given:

Amount of energy released = 3000 kJ

The chemical equation for the combustion of methane follows:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

3000 kJ of energy is released when 1 mole of methane is burnt

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of methane = 16 g/mol

Moles of methane = 1 moles

Putting values in above equation, we get:

$1mol=\frac{\text{Mass of methane}}{16g/mol}\\\\\text{Mass of methane}=(1mol\times 16g/mol)=16g$

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